From: carlosreimer@terra.com.br
To: Mark Lewis <mark.lewis@mir3.com>
Cc: pgsql-performance@postgresql.org
Subject: RES: RES: RES: Initial database loading and IDE x SCSI
Date: Fri, 2 Jun 2006 17:55:38 -0300
Message-ID: <PEEPKDFEHHEMKBBFPOOKKEHJCPAA.carlosreimer@terra.com.br> (raw)
In-Reply-To: <1149281044.20798.116.camel@archimedes>
> > Many thanks Mark,
> >
> > I will consider fsync=off only to do an initial load, not for a
> database normal operation.
> >
>
> This approach works well. You just need to remember to shut down the
> database and start it back up again with fsync enabled for it to be safe
> after the initial load.
>
> > I was just thinking about this hipotetical scenario:
> > a) a restore database operation
> > b) fsync off
> > c) write-back on (IDE)
> >
> > As I could understand, in this sceneraio, it´s normal the IDE
> drive be faster than the SCSI, ok?
> >
>
> If fsync is off, then the IDE drive loses its big advantage, so IDE and
> SCSI should be about the same speed.
>
Sorry, I would like to say fsync on instead of fsync off. But I think I understood.
With fsync off the performance should be almost the same (SCSI and IDE), and with fsync on
the IDE will be faster, but data are exposed.
Thanks!
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To: pgsql-performance@postgresql.org
Cc: carlosreimer@terra.com.br, mark.lewis@mir3.com
Subject: Re: RES: RES: RES: Initial database loading and IDE x SCSI
In-Reply-To: <PEEPKDFEHHEMKBBFPOOKKEHJCPAA.carlosreimer@terra.com.br>
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